How to interpret Ambiguous Options Symbol ?

sameer
Given Option symbol like "BANKNIFTY06APR1722300PE"

I can interpret it as
1) Monthly Option for year 2006 with strike price 1722300
OR
2) Weekly Option for year 2017 with strike price 22300 and date 06th April

Is there any rule defined by NSE to break this ambiguity ?
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